TWI742663B - Electrolytic processing apparatus and method thereof - Google Patents

Abstract

An electrolytic processing apparatus configured for processing a hole of a work piece. The electrolytic processing apparatus includes a work platform, an electrolyte providing device and an electrolytic electrode. The work platform includes a loading platform and a flow channel. When the loading platform loads the work piece, the position of the flow channel is corresponding to that of the hole. The electrolyte providing device connects to the flow channel to provide an electrolyte to the hole through the flow channel. The electrolytic electrode is configured relative to the work platform and moves in a direction perpendicular to the loading platform. When the loading platform loads the work piece, the electrolyte flows through the hole and the electrolytic electrode moves in the hole in a variable speed to process the inside surface of the hole by electrolytic process, thereby forming a characteristic shape of the hole.

Description

Electrochemical processing equipment and method

The present invention relates to a processing device, and in particular, to an electrochemical processing device that can process holes of different shapes by using electrochemical processing.

Nozzles are commonly used mechanical parts and are widely used in various fields. Usually the nozzle has tiny holes, so that the liquid is sprayed out in the form of mist when passing through the nozzle under pressure from the inside of the tube. Under the trend of miniaturization and precision in the structure of mechanical parts, when the shape of the hole of the nozzle is a cone, the nozzle can have a higher spray pressure and a better spray effect. For example, in the automotive industry, the cone-shaped micro-holes on the diesel engine nozzle help the atomization effect of fuel to improve fuel combustion efficiency and reduce exhaust gas; in the biomedical industry, drugs can pass through the cone The micro-holes are sprayed on the heart catheter stent to prevent the heart catheter stent from causing thrombosis in the blood vessel; in the semiconductor industry, the etching solution can be sprayed on the material to be removed through a nozzle with a tapered micro-hole. Improve machining accuracy.

Since the nozzle material is mostly corrosion-resistant, high-temperature resistant, high-hardness and high-strength alloy steel, the tapered micro-holes are difficult to form by traditional mechanical processing. The tapered micro-holes in the prior art are usually formed by electrical discharge machining or laser machining. Although the efficiency of the microholes formed by the electric discharge machining method is high, the discharge electrode will be worn out, which affects the shape and accuracy of the microholes. Furthermore, although laser processing does not have the problem of electrode wear, the quality of the microporous surface is poor and burrs are prone to occur. In addition, the existing technology can only process forward-tapered micro-holes. Therefore, when the design or structure requires inverted-tapered micro-holes, or even the inner wall of the micro-holes needs to be processed into a specific shape, the existing technology cannot achieve this.

Therefore, it is necessary to develop a new type of electrochemical machining equipment that can effectively process the hole shape of the workpiece according to the design requirements to solve the problems of the prior art.

In view of this, one category of the present invention is to provide an electrochemical machining equipment to solve the problems of the prior art.

According to a specific embodiment of the present invention, the electrochemical machining equipment is used to process holes on a workpiece. The electrochemical processing equipment includes a working platform, an electrolyte supply device, and an electrolysis electrode. The working platform includes a bearing platform and a runner on the bearing platform. The carrying platform is used to carry the workpiece. When the load-bearing platform carries the workpiece, the position of the runner corresponds to the hole position of the workpiece. The electrolyte supply device is connected to the flow channel to provide electrolyte to the hole through the flow channel. The electrolysis electrode is arranged relative to the working platform and moves in a direction perpendicular to the carrying platform. Wherein, when the carrying platform of the working platform carries the workpiece, the electrolyte provided by the electrolyte supply device flows through the hole, and the electrolytic electrode moves in the hole at a variable speed to electrochemically process the sidewall surface of the hole to form the hole. Characteristic shape.

Among them, the electrolysis electrode includes a body and an insulating layer. The insulating layer covers the side surface of the main body, so that one end of the main body is exposed to form a processed part. Further, the insulating layer is epoxy resin.

Among them, the variable speed includes the first variable speed and the second variable speed. The electrolysis electrode first moves in the hole at a first variable speed, and then moves in the hole at a second variable speed. First variable speed Greater than the second variable speed.

Among them, the electrolysis electrode rotates at a speed and moves in the hole at a variable speed at the same time.

The electrolytic processing equipment of the present invention further includes a power supply unit coupled to the workpiece and the electrolytic electrode. The power supply unit supplies positive electricity to the workpiece and supplies negative electricity to the electrolysis electrode.

The electrochemical processing equipment of the present invention further includes a drill bit, which is arranged relative to the working platform. The drill bit is used to drill a workpiece at a processing position to form a hole.

Further, the electrochemical processing equipment of the present invention includes a controller coupled to a drill bit and an electrolytic electrode. The controller controls the drill bit and the electrolytic electrode to process the workpiece at the processing position.

Another category of the present invention is to provide an electrochemical machining method to solve the problems of the prior art.

According to a specific embodiment of the present invention, an electrochemical machining method includes the following steps: preparing an electrolytic electrode; setting a workpiece with a hole on a carrying platform of a working platform, wherein the working platform includes a runner, and the position of the runner corresponds to the position of the hole; An electrolyte is provided to flow through the flow channel and the hole, and an electrolytic electrode is arranged in the hole; and the electrolytic electrode moves in the hole at a variable speed to electrochemically process the sidewall surface of the hole to form the characteristic shape of the hole.

Wherein, the step of preparing the electrolysis electrode further includes the following steps: forming an insulating layer to cover the outside of the electrolysis electrode; and grinding the insulating layer of the processed part of the electrolysis electrode. In the step of moving the electrolytic electrode in the hole at a variable speed to electrochemically process the sidewall surface of the hole to form the characteristic shape of the hole, further: the electrolytic electrode moves in the hole at a variable speed, and the sidewall of the hole is electrochemically processed by the processing part The characteristic shape of the hole is formed on the surface.

In a specific embodiment, the electrochemical machining method includes the following steps: drilling a workpiece To form holes.

Wherein, in the step of the electrolytic electrode moving in the hole at a variable speed, and forming the characteristic shape of the hole by electrochemically processing the sidewall surface of the hole, further: the electrolytic electrode first moves in the hole at the first variable speed, and then at the second The variable speed moves in the hole, and the sidewall surface of the hole is electrochemically processed to form the characteristic shape of the hole. The first variable speed is greater than the second variable speed.

To sum up, the electrochemical machining equipment of the present invention can process holes of various required shapes through the circumferentially insulated electrodes and the way of moving at variable speeds, and the electrolytic electrode can electrolytically process the holes uniformly by rotating to improve the processing Quality and efficiency. In addition, the electrochemical machining equipment can also perform drilling and electrochemical machining at the same machining location to improve efficiency and save costs.

1. 1’: Electrochemical processing equipment

11: Workpiece platform

111: Carrier Platform

112: Runner

115: electrolyte inlet

116: Electrolyte outlet

117: Groove

12: Electrolyte supply device

13: Electrolysis electrode

131: Body

132: Insulation layer

133: Processing Department

16’: Drill

17’: Controller

19: bottom plate

2: Workpiece

21: Hole

22A: First surface

22B: second surface

S1~S5, S11, S12, S41: steps

Fig. 1 is a simple schematic diagram of an electrochemical machining equipment according to a specific embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of the work platform and the workpiece in FIG. 1.

Fig. 3 is a schematic cross-sectional view of the electrolysis electrode and the workpiece in Fig. 1 during electrolysis.

Fig. 4 is a flow chart showing the steps of an electrochemical machining method according to a specific embodiment of the present invention.

Fig. 5 is a flow chart showing the steps of an electrochemical machining method according to a specific embodiment of the present invention.

Fig. 6 is a flowchart showing the steps of an electrochemical machining method according to a specific embodiment of the present invention.

Fig. 7 is a simple schematic diagram of an electrochemical machining equipment according to a specific embodiment of the present invention.

FIG. 8 is a flowchart of the steps of an electrochemical machining method according to a specific embodiment of the present invention.

In order to make the advantages of the present invention, the spirit and characteristics can be easier and clearer It is understood that the following will be detailed and discussed with specific embodiments and with reference to the accompanying drawings. It should be noted that these specific embodiments are only representative specific embodiments of the present invention, and the specific methods, devices, conditions, materials, etc. exemplified therein are not intended to limit the present invention or the corresponding specific embodiments. In addition, each device in the figure is only used to express its relative position and is not drawn according to its actual scale, which is explained first.

Please refer to Figure 1 and Figure 2. FIG. 1 is a schematic diagram of an electrochemical machining equipment 1 according to a specific embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of the work platform 11 and the workpiece 2 in FIG. 1. As shown in FIG. 1, the electrochemical processing equipment 1 of this embodiment is used to process a hole 21 on a workpiece 2, and it includes a work platform 11, an electrolyte supply device 12 and an electrolysis electrode 13. The working platform 11 includes a carrying platform 111, and the carrying platform 111 is used to carry the workpiece 2. The electrolyte supply device 12 is connected to the working platform 11 and used to provide electrolyte to the working platform 11. The electrolysis electrode 13 is arranged relative to the working platform 11 and moves in a direction perpendicular to the carrying platform 111.

In this embodiment, the electrochemical processing equipment 1 can include a bottom plate 19, and the working platform 11, the electrolyte supply device 12 and the electrolysis electrode 13 can all be arranged on the bottom plate 19. The work platform 11 can be fixed on the bottom plate 19 in a locked manner, and the workpiece 2 can be, but not limited to, be fixed on the supporting platform 111 in a locked or clamped manner. As shown in FIG. 2, the working platform 11 further includes a flow channel 112 located in the carrying platform 111. In this specific embodiment, the flow channel 112 is a blind hole and is arranged on the side of the carrying platform 111 that carries the workpiece 2. Further, the position of the flow channel 112 corresponds to the position of the hole 21 of the workpiece 2. Therefore, when the workpiece 2 is fixed on the carrying platform 111, the flow channel 112 and the hole 21 of the workpiece 2 communicate with each other. In addition, the size of the flow channel 112 may be larger than the size of the hole 21 of the workpiece 2. In practice, the shape and form of the flow channel 112 are not limited to this, and can be determined according to requirements.

The electrolyte supply device 12 can be connected to the flow channel 112 of the working platform 11 and can provide electrolyte to the flow channel 112. In this specific embodiment, the working platform 11 includes an electrolyte inlet 115 connected The electrolyte supply device 12 and the electrolyte inlet 115 are in communication with the flow channel 112. Therefore, when the electrolyte providing device 12 provides the electrolyte to the work platform 11, the electrolyte providing device 12 can provide the electrolyte to the hole 21 of the workpiece 2 through the electrolyte inlet 115 and the flow channel 112. Furthermore, the working platform 11 may include an electrolyte outlet 116 and a groove 117. The groove 117 is arranged around the outside of the carrying platform 111, and the electrolyte outlet 116 communicates with the groove 117 and connects with the electrolyte supply device 12. After the electrolyte provided by the electrolyte supply device 12 flows through the hole of the workpiece 2 from the flow channel 112, it further flows to the groove 117 and flows back to the electrolyte supply device 12 through the electrolyte outlet 116. Therefore, the electrolyte provided by the electrolyte supply device 12 can sequentially flow through the electrolyte inlet 115, the flow channel 112, the hole 21 of the workpiece 2, the groove 117, and the electrolyte outlet 116 to form a loop. In practice, the electrolyte flowing out of the groove 117 may not flow back to the electrolyte supply device 12.

In this specific embodiment, the electrolysis electrode 13 is arranged above the working platform 11 and moves in a direction close to and away from the working platform 11. Further, when the workpiece 2 is fixed on the carrying platform 111, the position of the electrolysis electrode 13 corresponds to the position of the hole 21 of the workpiece 2. In practice, the electrolysis electrode 13 can be driven by a motor, an air cylinder, or a screw. In this specific embodiment, the position of the electrolysis electrode 13 corresponds to the position of the flow channel 112 in addition to the hole 21 of the workpiece 2. Therefore, the electrolytic electrode 13 can extend into or penetrate the hole 21 of the workpiece 2 for electrolytic machining.

In this specific embodiment, the electrolytic processing equipment 1 further includes a power supply unit (not shown), which is coupled to the workpiece 2 and the electrolytic electrode 13. The power supply unit can provide positive electricity to the workpiece 2 and provide negative electricity to the electrolysis electrode 13. In practice, the power supply unit may be a DC power supply. When the electrolysis electrode 13 moves into the hole 21 of the workpiece 2, the electrolysis electrode 13 and the workpiece 2 generate an electrochemical reaction through the electrolyte in the hole 21, and the sidewall of the hole 21 is electrolyzed to produce a characteristic shape.

Please refer to FIG. 3, which is a schematic cross-sectional view of the electrolysis electrode 13 and the workpiece 2 in FIG. 1 during electrolysis. In this embodiment, the electrolysis electrode 13 further includes a body 131 and an insulating layer 132. The insulating layer 132 covers the side surface 1311 of the main body 131, but does not cover the end surface of the main body 131 of the electrolysis electrode 13, so that one end of the main body 131 is exposed to form the processed portion 133. In practice, the material of the body 131 of the electrolytic electrode 13 may be metal or a conductive material, and the material of the insulating layer 132 may be a non-conductive material, such as epoxy resin. Since the insulating layer 132 is not conductive, when the electrolytic electrode 13 extends into or penetrates the hole 21 of the workpiece 2 for electrolytic processing, the outer peripheral surface of the body 131 of the electrolytic electrode 13 will not electrochemically react with the hole 21, and is only located on the end surface of the body 131 The processing part 133 of the workpiece will be electrochemically reacted with the inner wall of the hole 21 of the workpiece 2 through the electrolyte. Therefore, when the electrolysis electrode 13 is located in the hole 21 of the workpiece 2 and undergoes electrolysis, the processed portion 133 of the electrolysis electrode 13 and the side wall of the hole 21 generate an electric field and an electrochemical reaction, so that the side wall of the hole 21 is recessed due to electrolysis. Further, when the electrolysis electrode 13 moves, the processed portion 133 of the electrolysis electrode 13 undergoes electrolysis along with the position of the processed portion 133 on the side wall of the hole, thereby generating a characteristic shape.

Further, in this embodiment, the electrolytic electrode 13 rotates at a speed and moves in the hole 21 of the workpiece 2 for electrolytic machining. In practice, the electrolysis electrode 13 can rotate at a rotation speed of 1000 rpm, 2000 rpm, 3000 rpm, 4000 rpm, or 5000 rpm or more. As the electrolysis electrode 13 rotates in the hole 21, the electrolysis electrode 13 can drive the electrolyte between the electrolysis electrode 13 and the hole 21 to flow uniformly, so that the electrolytic processing reaction is more uniform. Therefore, the electrolytic electrode 13 can uniformly electrochemically process the holes 21 to reduce and remove the burrs of the holes, thereby improving efficiency and processing quality.

Please refer to Figure 1 to Figure 4. Fig. 4 is a flow chart showing the steps of an electrochemical machining method according to a specific embodiment of the present invention. The electrochemical machining method of FIG. 4 can be used by the electrochemical machining equipment 1 of FIG. 1 Come to reach. In this specific embodiment, the electrochemical machining method includes the following steps: Step S1: preparing the electrolytic electrode 13; Step S2: setting the workpiece 2 with the hole 21 on the carrying platform 111 of the working platform 11, wherein the working platform 11 includes a flow channel 112 , And the position of the flow channel 112 corresponds to the position of the hole 21; Step S3: Provide the electrolyte to flow through the flow channel 112 and the hole 21, and set the electrolysis electrode 13 in the hole; and Step S4: The electrolysis electrode 13 is in the hole at a variable speed 21 is moved to form the characteristic shape of the hole 21 by electrochemically processing the sidewall surface of the hole 21. In practice, the electrolytic electrode 13 prepares the processing part 133 and is arranged above the carrying platform 111. After the workpiece 2 is fixed on the supporting platform 111, the hole 21 of the workpiece 2 communicates with the flow channel 112 of the working platform 11. Then, the electrolyte supply device 12 provides the electrolyte, and the electrolyte flows from the flow channel 112 toward the hole 21 at a variable speed. At this time, the power supply unit 15 turns on the power and the electrolysis electrode 13 moves in the hole 21 containing the electrolyte to electrolytically process the sidewall surface of the hole 21 to form a characteristic shape. The variable speed can be acceleration, but is not limited to this, and the variable speed can also be composed of multiple different speeds.

The aforementioned characteristic shape can be determined according to the moving direction and variable speed of the electrolytic electrode covered by the insulating layer on the outer surface of the body in the hole. As shown in FIG. 3, in this embodiment, the workpiece 2 includes a first surface 22A and a second surface 22B. When the electrolytic electrode 13 passes through the hole 21 of the workpiece 2 and moves in a direction from the second surface 22B to the first surface 22A at a positive acceleration, the characteristic shape of the hole 21 is an inverted cone shape. In practice, since the moving speed of the electrolytic electrode 13 in the hole 21 is inversely proportional to the degree of electrochemical reaction, when the electrolytic electrode 13 is processing the hole 21, the electrolytic electrode 13 moves from the second surface 22B to the second surface 22B at a speed from slow to fast. The first surface 22A moves. The initial moving speed of the electrolysis electrode 13 is relatively small, and the depression on the sidewall surface of the hole 21 close to the second surface 22B is relatively large. In other words, the electrolytic electrode 13 has the largest electrochemical reaction in the hole 21 close to the second surface 22B. When the electrolysis electrode 13 moves to the first surface 22A, due to the moving speed of the electrolysis electrode 13 Accelerated, resulting in a decrease in the degree of electrochemical reaction, which in turn produces a hole 21 in an inverted cone shape. The characteristic shape of the hole is not limited to the inverted cone shape, and may also be a forward cone shape, an hourglass shape, a gourd shape, and the like. When the electrolytic electrode 13 passes through the hole 21 of the workpiece 2 and moves in a direction from the second surface 22B to the first surface 22A at a negative acceleration, the characteristic shape of the hole 21 is a positive cone shape. In addition, when the electrolysis electrode 13 sequentially moves from the second surface 22B to the first surface 22A in a constant velocity, constant acceleration, constant velocity, constant deceleration, and constant velocity, the characteristic shape of the hole 21 is a gourd shape .

Please refer to FIG. 3, FIG. 4 and FIG. 5. FIG. 5 is a flow chart of the electrochemical machining method according to a specific embodiment of the present invention. In this specific embodiment, step S1 in FIG. 4 may further include: step S11: forming an insulating layer 132 to cover the outside of the electrolytic electrode 13; and step S12: grinding the insulating layer 132 of the processed portion 133 of the electrolytic electrode 13. In practice, the electrolytic electrode 13 can be electroplated on the side surface 1311 of the main body 131 by electrolytic coating to form an insulating layer. Then, the electrolytic electrode 13 can be ground by a grinder. The insulating layer is exposed to expose the metal material at the end to form the processed portion 133. In this specific embodiment, the shape of the processed portion 133 of the electrolytic electrode 13 is a flat surface, but it is not limited to this in practice, and the shape of the processed portion may also be a convex point, an arc shape, or a cone shape.

Please refer to Figure 6 and Figure 7. FIG. 6 is a simple schematic diagram of an electrochemical machining apparatus 1'according to a specific embodiment of the present invention, and FIG. 7 is a flowchart of steps of an electrochemical machining method according to a specific embodiment of the present invention. The electrochemical machining method of Fig. 7 can be achieved by the electrochemical machining apparatus 1'of Fig. 6. The difference between this specific embodiment and the foregoing specific embodiments is that the electrochemical machining equipment 1'of this specific embodiment further includes a drill bit 16' and a controller 17'. In this embodiment, the drill bit 16' is used to drill the workpiece 2 to form a hole. The controller 17' is coupled to the drill bit and the electrolysis electrode 13. In practice, the drill bit 16' can move closer to and away from the work platform 11, and the drill bit 16' and the electrolysis electrode 13 are both movably arranged on the working platform 11. The controller 17' can be a CNC controller and can execute a CNC program. Therefore, the controller 17' can control the position of the drill bit and the electrolysis electrode 13 on the working platform 11. Further, the controller 17' controls the drill bit 16' to move above the workpiece 2 and drills the workpiece 2 to create a hole 21 (step S5 in FIG. 7), and the controller 17' controls the drill bit 16' to move away from the workpiece 2. Then, the controller 17 ′ controls the electrolysis electrode 13 to move to the position where the drill 16 ′ processes the workpiece 2 to electrochemically process the hole of the workpiece 2. In another specific embodiment, the controller 17' replaces the drill bit 16' and the electrolysis electrode 13 in a tool-changing manner, so that the drill bit 16' and the electrolysis electrode 13 both process the workpiece 2 at the same processing position. In practice, the controller 17' can first control the drill bit 16' to drill the workpiece 2 through a CNC program to create a hole 21, and then the controller 17' executes a CNC program for tool change to set the electrolysis electrode 13 on the drill bit 16' to process the workpiece. At the position 2, then the electrolytic electrode 13 performs electrolytic machining on the hole 21 formed by the drill 16' to process the workpiece 2. Therefore, the drill bit 16' and the electrolytic electrode 13 are kept at the center of the hole of the workpiece 2 when the workpiece 2 is processed, so as to maintain the machining accuracy, thereby improving efficiency and saving costs. Please note that the electrolytic electrode 13 of this embodiment includes an insulating layer and a processed part.

In addition to moving in one direction in the hole, the aforementioned electrolysis electrode can also move in the hole multiple times. Please refer to FIG. 3 and FIG. 8. FIG. 8 shows a flow chart of the electrochemical machining method according to a specific embodiment of the present invention. In this specific embodiment, as in step S41, the variable speed includes a first variable speed and a second variable speed. The electrolysis electrode 13 first moves in the hole 21 at a first variable speed, and then moves in the hole 21 at a second variable speed. Among them, the first variable speed is greater than the second variable speed. In practice, when the hole 21 of the workpiece 2 is of poor quality or has burrs, the electrolysis electrode 13 can first modify the shape of the hole 21 and remove the burrs at the first variable speed. Then, the electrolysis electrode 13 further processes the hole 21 at the second variable speed to ensure the quality of the processing and thereby improve the efficiency.

To sum up, the electrochemical processing equipment of the present invention can penetrate the electrode insulated on the peripheral surface to And the holes of various required shapes are processed by the method of variable speed movement, and the electrolytic electrode can evenly electrolytically process the holes by rotation to improve the processing quality and efficiency. In addition, the electrochemical machining equipment can also perform drilling and electrochemical machining at the same machining position to save costs.

Based on the above detailed description of the preferred embodiments, it is hoped that the characteristics and spirit of the present invention can be described more clearly, and the scope of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, the purpose is to cover various changes and equivalent arrangements within the scope of the patent for which the present invention is intended. Therefore, the scope of the patent application for the present invention should be interpreted in the broadest sense based on the above description, so that it covers all possible changes and equivalent arrangements.

1: Electrochemical processing equipment

11: Work platform

115: electrolyte inlet

116: Electrolyte outlet

12: Electrolyte supply device

13: Electrolysis electrode

19: bottom plate

2: Workpiece

Claims (12)

An electrochemical machining equipment for processing a hole on a workpiece. The electrochemical machining equipment includes: a working platform, including a carrying platform and a flow channel on the carrying platform, the carrying platform is used for carrying the workpiece, When the carrying platform carries the workpiece, the position of the flow channel corresponds to the position of the hole of the workpiece; an electrolyte supply device connected to the flow channel to provide an electrolyte to the hole through the flow channel; and an electrolysis electrode opposite to Is set on the working platform and moves in a direction perpendicular to the carrying platform; wherein, when the carrying platform of the working platform carries the workpiece, the electrolyte provided by the electrolyte supply device flows through the hole, and the electrolysis The electrode moves in the hole at a variable speed and electrochemically processes the side wall surface of the hole to deform the hole according to the variable speed to form a characteristic shape. According to the electrochemical processing equipment described in claim 1, wherein the electrolytic electrode includes a body and an insulating layer, and the insulating layer covers a side surface of the body so that one end of the body is exposed to form a processing part. The electrochemical processing equipment described in item 2 of the scope of patent application, wherein the insulating layer is epoxy resin. As for the electrochemical machining equipment described in claim 1, wherein the variable speed includes a first variable speed and a second variable speed, and the electrolytic electrode first moves in the hole at the first variable speed, and then at the The second variable speed moves in the hole, and the first variable speed is greater than the second variable speed. The electrochemical processing equipment described in item 1 of the scope of patent application, wherein the electrolytic electrode rotates at a speed and moves in the hole at the variable speed at the same time. The electrochemical processing equipment described in the first item of the patent application further includes a power supply unit coupled to the workpiece and the electrolysis electrode, and the power supply unit provides positive electricity to the workpiece and negative electricity to the electrolysis electrode. The electrochemical machining equipment described in item 1 of the scope of patent application further includes a drill bit arranged relative to the work platform, and the drill bit is used to drill the workpiece at a processing position to form the hole. The electrochemical machining equipment described in claim 7 further includes a controller coupled to the drill bit and the electrolysis electrode, and the controller controls the drill bit and the electrolysis electrode to process the workpiece at the processing position. An electrolytic machining method comprising the following steps: preparing an electrolytic electrode; setting a workpiece with a hole on a carrying platform of a working platform, wherein the working platform includes a flow channel, and the position of the flow channel corresponds to the position of the hole ; Provide an electrolyte to flow through the flow channel and the hole, and set the electrolysis electrode in the hole; and the electrolysis electrode moves in the hole at a variable speed and electrolytically process the side wall surface of the hole, according to the change The speed is processed to deform the hole to form a characteristic shape. According to the electrolytic machining method described in claim 9, wherein the step of preparing the electrolytic electrode further includes the following steps: forming an insulating layer to cover the outside of the electrolytic electrode; and grinding a processed part of the electrolytic electrode The insulating layer; and the electrolytic electrode moves in the hole at the variable speed to electrochemically process the sidewall surface of the hole to form the characteristic shape of the hole In the step, it is further that the electrolysis electrode moves in the hole at the variable speed, and the processing part electrochemically processes the sidewall surface of the hole to form the characteristic shape of the hole. The electrochemical machining method described in item 9 of the scope of patent application further includes the following steps: drilling the workpiece to form the hole. The electrochemical machining method according to claim 9, wherein the electrolytic electrode moves in the hole at the variable speed to electrochemically process the sidewall surface of the hole to form the characteristic shape of the hole, further The electrolysis electrode first moves in the hole at a first variable speed, and then moves in the hole at a second variable speed to electrochemically process the sidewall surface of the hole to form the characteristic shape of the hole, wherein the The first variable speed is greater than the second variable speed.

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